Device for tightening screw bolts



Junezs, 1929. WSTEVR 1.718.669

` DEVICE FOR TIGHTENING SCREW BOLTS Filed Jan. 20, 192'?- INVENTOR.

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BY /O Patented June 25, 1929. i i

UNITED STATES PATENTl WILLIAM srnvna, or rnrnnnnnrnm, rnnusrnvania, AssIGNon `:roi `nnwnan e.

Bunn MANUFACTURING CoM-lenny, or rmacannnrmm rnNNsYLvAmA, A con- E'ORATION 0F PENNSYLVANIA.

Dnvrcn non frienrnnrne 'sennw Bours.

Application filed January 20, 1927'. Serial No. 162,291.

This invention relates to a device for tightening screw bolts, and more particularly it relates to a device for holding the nut aga-inst rotation while the screw bolt is threaded therethrough.

It often occurs that the nut used in conjunction with a screw bolt is inaccessibly located and therefore can not be held against rotation by the ordinary wrench. This is, especially, the case in the construction of automobile bodies ot' pressed metal stampings where some of the sheet metal panels are fastened together by screw bolts, although of course, there. are any number of other instances wherein the device could be used. V

The main object of the invention is to provide a simple and inexpensive device for readily `holding against rotation the nuts used with screw bolts which otherwise would be practically inaccessible.

Other objects and advantages will become apparent from time to time;

An embodiment of the invention is shown' in the accompanying drawing, wherein Fig. 1 is a vertical section through the device,

Fig. 2 is a view similaito Fig. 1, showing a. screw bolt securing two members together and the nut and washer therefor being in the device,

Fig. 3 is atop plan view of the device,

Fig. 4 is a section taken on line 4-4 of Fig. 2, and

Fig. 5 is a sectional view, showing the device partly removed from the nut.

The device comprises a long piece of stock forming a handle 1, the upper end of which is laterally bent at right angles to the remainder of the handle to form a wrench por tion 2.

The wrench portion is provided adjacent its free end with a square, or other shaped socket as desired, socket 3 for the reception of the bolt nut 4. The bottom of the socket is apertured at 5 to allow the screw bolt to pass therethrough.

The upper surface of the wrench surrounding the socket is countersunk to provide an annular recess 6 for the reception of a washer 7. The circumference of this annular recess is such that a portion thereof will lie beyond the free edge of the wrench.

A spring clip of substantially Z shape has an end 8 secured to the handle 1 and its intermediate section 9 extending diagonally upward beneath the wrench so as to end adjacent the lower free edge thereof. The other ond l0 of the spring clip extends upwardly and inwardly from this point and is provided at its upper end with an enlargement 11. The inner side ofthe enlargement is provided with an arcuate cutaway portion 12, which serves to complete the annular recess 6.

In practice the screw bolt 13 is passed through the two members 14 and 15, which it is desired to secure together. The nut 4 is then placed in the socket 3 of the wrench and the washer 7 in the annular recess 6, the washer while being inserted in place pushing back the arm 10 of the spring clip. It is perfectly apparent that. the enlargement 11 and arcuate cutaway portion 12 will serve to hold' the washer in place because of the resilient action of the clip, and at the same time, of course, the nut 4 will be held.

The wrench is manipulated by its handle until the inner end of the screw bolt has been located and passed through the openings in the washer, nut, and socket. After this is done, the screw bolt is turned from the outside` until the nut is firmly seated. The end of the screw bolt bearing on the spring clip will also tend to force the nut to ride upwardly on the bolt.

It will thus be evident that a simple, inexpensive and practical device for reaching and holding inaccessible nuts against rotation is provided by the invention, and the various adaptations which it may take is only limited by the scope of the claims.

I claim:

1. A device for tightening screw bolts co1nprising a handle having a laterally extending portion, said portion having a socket with an aperture in its base for the reception of a nut and the passage of a screw bolt, and means arranged above said socket for receiving and holding a washer, a part of said means being secured to the handle below the laterally extending portion, and yieldingly engaging the wz slier.

2. A device for tightening screw bolts coniprising a handle having a laterally extending portion, said portion having two superimposed recesses communicating with each other, one of which is adapted to receive a nut and the other of which is adapted to receive a washer, a spring member secured to i the hndle and cooperating with the washer passage of a screw bolt and a seat arranged receiving recess to complete the oiroumferabove said socket for receiving a washer and ence thereof and to hold the Washer in place. inea-ns yieldingly holding said washer on its l0 3. A device for tightening screw bolts coinseat. 5 prising a handle having a-n extended portion, In testimony whereof he hereunto nixcs said portion having a socket with an aperture his signature. in its base for the reception of a. nut and the WILLIAM STEVER. 

